<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 * @version   $Id: NotExists.php 16971 2009-07-22 18:05:45Z mikaelkael $
 */

/**
 * @see Zend_Validate_File_Exists
 */
require_once 'Zend/Validate/File/Exists.php';

/**
 * Validator which checks if the destination file does not exist
 *
 * @category  Zend
 * @package   Zend_Validate
 * @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_File_NotExists extends Zend_Validate_File_Exists
{
	/**
	 * @const string Error constants
	 */
	const DOES_EXIST = 'fileNotExistsDoesExist';

	/**
	 * @var array Error message templates
	 */
	protected $_messageTemplates = array(
	self::DOES_EXIST => "The file '%value%' does exist"
	);

	/**
	 * Defined by Zend_Validate_Interface
	 *
	 * Returns true if and only if the file does not exist in the set destinations
	 *
	 * @param  string  $value Real file to check for
	 * @param  array   $file  File data from Zend_File_Transfer
	 * @return boolean
	 */
	public function isValid($value, $file = null)
	{
		$directories = $this->getDirectory(true);
		if (($file !== null) and (!empty($file['destination']))) {
			$directories[] = $file['destination'];
		} else if (!isset($file['name'])) {
			$file['name'] = $value;
		}

		foreach ($directories as $directory) {
			if (empty($directory)) {
				continue;
			}

			$check = true;
			if (file_exists($directory . DIRECTORY_SEPARATOR . $file['name'])) {
				return $this->_throw($file, self::DOES_EXIST);
			}
		}

		if (!isset($check)) {
			return $this->_throw($file, self::DOES_EXIST);
		}

		return true;
	}
}
